Comment 38 for bug 109943

there is also activity manager.

<Archaeopteryx> wsm: seem like it starts here: http://mxr.mozilla.org/comm-central/source/mail/components/activity/modules/autosync.js#283
<Archaeopteryx> and onProgressChange gets called too much: http://mxr.mozilla.org/comm-central/source/mail/components/activity/content/activity.xml#485
<wsm> Archaeopteryx: see also https://bugzilla.mozilla.org/show_bug.cgi?id=742697#c14
<firebot> Bug 742697 nor, --, ---, acelists, NEW, SMTP connection progress bar causes high CPU usage
<wsm> how do you know it is called too much?
<Archaeopteryx> just a guess because i see no throtteling code. autsync's comment says it want to prevent event overflow, but it don't see bundling messaes per account at http://mxr.mozilla.org/comm-central/source/mail/components/activity/modules/autosync.js#249 which calls setProgress. you could verify with logging enabled, onDownloadStarted logs in the first lines